Discovery - University of Dundee - Online Publications

Library & Learning Centre

Superimposed ultrasonic oscillations in compression tests of aluminium

Superimposed ultrasonic oscillations in compression tests of aluminium

Research output: Contribution to journalArticle

View graph of relations

Authors

Research units

Info

Original languageEnglish
Pagese511-e515
Number of pages5
JournalUltrasonics
Journal publication date22 Dec 2006
Journal numberSupplement
Volume44
DOIs
StatePublished

Abstract

The application of ultrasonics in metal forming applications has been shown to reduce the forming load significantly in many research studies. The load reduction has been related to the stress superposition effect, rise in temperature and change in the friction condition between the specimen and die interfaces. This paper reports an investigation into the effects of superimposed ultrasonic oscillation of the die in compression tests on aluminium specimens. In particular, a finite element model is developed to simulate uniaxial compression and to model the effects of a change in the friction boundary condition when ultrasonic excitation is applied to the lower platen. The model predictions of the stress-strain relationship can be compared with test data to provide some insights into the effects of the interfacial condition. The paper shows how the analysis of the test data, combined with finite element models of ultrasonic compression test simulations, allows some initial conclusions to be drawn regarding the influence of the interfacial friction during ultrasonic compression.

Documents

Library & Learning Centre

Contact | Accessibility | Policy